THE CORPORATE LIBRARY

Related Party Transactions and Outside Related Director Information

Keithley Instruments, Inc. (KEI)

12/29/2005 Proxy Information

James B. Griswold has been a partner in the law firm of Baker & Hostetler LLP since 1982. Baker & Hostetler LLP served as general outside legal counsel to the Company during the fiscal year ended September 30, 2005 and is expected to render services in such capacity to the Company in the future.

12/22/2004 Proxy Information

James B. Griswold has been a partner in the law firm of Baker & Hostetler LLP since 1982. Baker & Hostetler LLP served as general outside legal counsel to the Company during the fiscal year ended September 30, 2004 and is expected to render services in such capacity to the Company in the future.

1/6/2004 Proxy Information

James B. Griswold has been a partner in the law firm of Baker & Hostetler LLP since 1982. Baker & Hostetler LLP served as general outside legal counsel to the Company during the fiscal year ended September 30, 2003 and is expected to render services in such capacity to the Company in the future.